Closure means for coking retorts



Nov. '7, 1933.

G. GoETz ,933,729

CLOSURE MEANS FOR COKING RETORTS Filed July 21, 1922 2 sheets-sheet l 35 /5 4 2 Sheets-Sheetl 2 G. GOETZ CLOSURE MEANS FOR COKING RETORTS fr, l

Filed July 2l, 1932 f/f/f//f/ LIC Nov. 7, 1933.

F l G. 5.

CJI

Patented Nov. 7, 1933 UNITED STATES f-PATENT' orrlcE*v 1,933,729Y n CLosUeE MEANS Foa' cartine REToRTs Gottfried Goetz, Webster Groves, Mo., assigner to Ludwig Kern, Webster Groves, Mo.

Applicaticn `l'uly 21, 1932. Serial No. 623,702

2 claims. (c1. y2oz-'251) p y.-

iiciently gas-tight within the requirements of the retort; the provision of a closure of the class described which is readily moved from closed to open position; and the provision of a closure oi the class described which occupies a minimum of space and forms no objectionable projections when open. Other objects may be in partv obvious and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations of elements, features of construction, and arrangements of parts which will be exemplied in the structures hereinafter described, and the scope of the application of `which will be indicated in the following claims.

In the accompanying drawings, in which is illustrated one of various possible'embodiments of the invention,

Fig. 1 is a top plan View of a closure embodying the present invention;

Fig. 2 is a section taken along line 2 2 of Fig. 1;

Fig. 3 is a section taken along line 3-3 of Fig. l;

Fig 4 is a bottom plan view of a door; and,

Fig. 5 is a top plan View of a door frame.

Similar reference characters indicate corresponding parts throughout the several views of the drawings.

The present invention is directed particularly to charging doors for the tops of Vertical coking or carbonizing retorts of the general types shown in my copending patent applications Serial Numbers 623,700 and 623,701, filed July 21, 1932. Charging doors heretofore provided for retorts of this type have been objectionable in that they are bulky and require considerable power to be moved, and in addition, when open, extend a considerable distance above the type of the retort and present a substantial obstruction to free movement of charging hoppers and the like. The present invention provides a closure means whereby these diiculties are eliminated.

Referring now more particularly to Fig. l, numeral 1 indicates generally the top of a retort, which, usually, is formed of cement, brick or like refractory material. The coking chamber of the retort is indicated by numeral 2. Bricked or otherwise built into the top lis a door frame '3, which has a generally rectangular shape with the ends 4 of the rectangle extended (see Fig; 3).

Theframe S'preferably comprises side pieces 5, which are channel beams, and end pieces 7, which have the general appearance of a channel beam as to the lower portion thereof, but which are lprovided with an upper angular extension 9 (see Fig. 3). The extension 9 forms a shoulder or flange 11 against which the door, indicated gen erally by'n'umeral y13, abuts. Thetop flat portion vof the extension 9 overhangs the'door or closure means, to be described, and thus provides a stop which prevents the door from lifting vAs installed onY the top of the retort, the beams 5 and 7 are preferably embedded in the Walls of Vthe retort so that their top edges are substantially l" on a level with the top of the retort (see Fig. 3). Under these circumstances, it will be seen that the top surface of the beams 5 and 7 present a substantially rectangular facing 17 upon which the door moves. 'The door or closurerneans properly, indicated by numeral 13, comprises end pieces 19 which have the form of inverted U-beams, and which are joined by side beams 21 (see Fig. l) preferably of I shape. Extending down the longi-V tudinal center of the door 13 is a reenforcing beam 23, and extending transversely of the door are a plurality of reenforcing cross beams 25: The beams 23 and 25 are desirably'secured to each other and to the outer frame comprising the beams 19 and 2l, or are all cast as one piece. Eyelets 27 are desirably provided near the central portion of the door, at the intersection of the longitudinal beam 23 with one or more of the transverse beams 25. These eyelets provide means for attaching cables and the like to lift the door into place, and to remove it and the like. The eyelets 27 may also be drilled to accommodate pyrometers for reading the temperature of the interior of the retort.

In the series cf rectangles formed by the intersection or the various beams of the door are cast or otherwise secured blocks of refractory material 29. The blocks 29 are preferably of such i 1 nature that they resist the action of the heat of the retort. In order to make the door as gastight as possible, the blocks 29 are preferably cemented in place against the various beams.

Borne in the interior channel of the U-beams 19, constituting the ends ofthe door 13, are a number of rollers 31. The rollers 31 preferably extend slightly 4beyond the beams 19, so that the door may be rolled thereon. When the door is in position, the rollers 3l move upon the face 17 of the door frame.

Along the top of each U-beam 19 a gear rack 33 is provided. The racks 33 cooperate with a pair of pinions 35 (see Fig. 3) which are supported on a shaft 37. The shaft 37 is borne in bearings`39 mounted upon the top face 15 of the extending portion 9 of the side channel beams 7 of the door frame. In its assembled position on the retort, the door 13 preferably slides rather tightly against the door frame 7, in order to provide a, reasonably air-tight joint. The rectangular portion of the door framel 3 enclosesthe mouth of the retort with which itis associated. .The extending arms or ends 7 are inthe region alongside of the retort. In order further to seal the retort, an overhanging flange'41 is desirably bolted or otherwise secured to the top of the side channel beam 5 against which the door 13 abuts when it `is shut. The overhang of the flange 41 is suitable to receive, in a. relatively tight fit, the projecting horizontal portion 43 of the L-beam 21 (see Fig. 2). Another flange 45 is secured to the other L-beam 21 and interlocks with Ythe top iiange of beam 5. This' cooperation or interlocking enhances the gas-tightness of the closure as a whole.

Stops 45 (Fig. 1) prevent the door from opening too far. Y The operation of the door is substantially as follows:

Power is applied to the shaft 37 by any suitable means, such as an electric motor. The consequentY rotation of the pinions 35, which engage the rack 33, moves the door sidewardly in the frame 3, either to close theY mouth of the retort, or to open the same. By reason of the rollers 31, the motion of the 'door is without excessive friction, and the power necessary to move the door is thereby reduced.

As shown in Fig. 1, the door is in Vclosed position over the mouth of the retort. Still referring to Fig. 1, when the door is open, it moves to the right,` leaving the mouth of the retort open for charging. f

The weight of the door, and the closeness of its fit against the side and end beams of the door frame, and the interlock between the flanges 41 and 43, all make the closure substantially gastight, or at least sufliciently gas-tight to be within the requirements of the retort.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in carrying out the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. Closure means for coking retorts comprising a frame having a rectangular doorway portion of channel beams, the end beams of the rectangular portion being extended beyond the limits of the rectangle, the said end beams being provided with upstanding flanges throughout` their length, a rectangular door substantiallyrequal in length'to'the distance between said upstanding flanges and substantially equal in width to the width of said rectangular portion, said door being provided with means whereby it is sl'idable on said frame between said upstanding anges between closed position, in juxtaposition to the rectangular portion of ysaid frame, and open position, in juxtaposition to the said extended end beams of said frame, and means for moving said door in said frame, said last-named means comprising a rack at each end of said door,` a Vdriven shaft supported in bearings mounted on said frame and extending longitudinally across said frame, and pinions secured to said shaft and engaging saidracks, and cooperating flanges on the side of the door and the side beam of the frame abutting when the door is in closed position, said flanges interlocking when the door is in closed position to make said closure substantially gas-tight.

2. Closure means for coking retorts comprising a frame having a horizontal, rectangular doorway portionembracing the inouthof the retort, two opposite sides of said portion being extended beyond the rectanglaa rectangular door fitting within said frame and slidable therein, a lrack on said door, a driven pinion engaging said rack to move said door between closed position, in juxtaposition to the rectangular portion of the frame;

frame and said door adapted to interlock when- 

